.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

@media (min-width: 1550px) {
  .container {
    max-width: 1380px;
  }
}

@media (min-width: 1920px) {
  .container {
    max-width: 1500px;
  }
}

.flex {
  display: flex;
}

.flex-column {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

.align-center {
  align-items: center;
}

.align-start {
  align-items: flex-start;
}

.align-end {
  align-items: flex-end;
}

.mt-xs {
  margin-top: 4px;
}

.mt-sm {
  margin-top: 8px;
}

.mt-md {
  margin-top: 16px;
}

.mt-lg {
  margin-top: 24px;
}

.mt-xl {
  margin-top: 32px;
}

.mb-xs {
  margin-bottom: 4px;
}

.mb-sm {
  margin-bottom: 8px;
}

.mb-md {
  margin-bottom: 16px;
}

.mb-lg {
  margin-bottom: 24px;
}

.mb-xl {
  margin-bottom: 32px;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.py-md {
  padding-top: 16px;
  padding-bottom: 16px;
}

.px-md {
  padding-left: 16px;
  padding-right: 16px;
}

.text-center {
  text-align: center;
}

.text-primary {
  color: #3498db;
}

.text-secondary {
  color: #2ecc71;
}

.text-accent {
  color: #e74c3c;
}

.btn {
  display: inline-block;
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: 0.3s ease;
  border: none;
  outline: none;
}

.btn:hover {
  opacity: 0.9;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: #3498db;
  color: white;
}

.btn-secondary {
  background-color: #2ecc71;
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid #3498db;
  color: #3498db;
}

.btn-outline:hover {
  background-color: #3498db;
  color: white;
}

.card {
  background-color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 24px;
  margin-bottom: 24px;
}

.img-fluid {
  max-width: 100%;
  height: auto;
}

.hidden {
  display: none !important;
}

@media (max-width: 576px) {
  .hidden-mobile {
    display: none !important;
  }
}

@media (min-width: 576px) and (max-width: 992px) {
  .hidden-tablet {
    display: none !important;
  }
}

@media (min-width: 992px) {
  .hidden-desktop {
    display: none !important;
  }
}

@media (min-width: 576px) {
  .visible-mobile {
    display: none !important;
  }
}

@media (max-width: 576px), (min-width: 992px) {
  .visible-tablet {
    display: none !important;
  }
}

@media (max-width: 992px) {
  .visible-desktop {
    display: none !important;
  }
}
